Pick mechanism for looms



Jan. 21, 1930.

B. F. HOBSON PICK MECHANISM FOR LOQMS Filed Dec. 22, 1928 2 Sheets-SheetCutout;

Q Jan. 2 1, 1930. B. F. HOBSON 1,744,225

PICK MECHANISM FOR LOOMS Filed Dec. 22. 1928 2 Sheets-Sheet 2 gwuentozB- E i /068071 Patented Jan. 21, 1930 UNITED STATES PATENT OFFICEBENJAMIN F. HOIBSON, F MON'II CELLG, ARKANSAS, ASSIG-NOR OF ONE-HALF 'IOT. O.

DEAL, or MONTICELLO, ARKANSAS PICK MECHANISM FOR LOOMS Application filedDecember 22, 1928. Serial No. 327,892.

ordinary picker sticks and the actuating cams therefor but whichincludes a spring projectedstrikerat each end of the lay beam, and meansintermittently operated for retractingthe striker, the striker, beingprojected by a spring.

A further object is to mount the lay beam upon guides so that it. mayreciprocateback and forth toward the shed and provide means forreciprocating the laybeam and actuating the shuttle strikers or picks.

A further object is to provide a mechanism of this character which ismore positive in its action, in which the pick mechanism is enclosed andwhich may be mounted upon the ordinaryloom frame.

Other objects will appear in the course of the following description.

My invention is illustrated in the accompanying drawings, wherein Figure1 isa top plan view of a portion of a loom with my pick mechanismapplied thereto with the lay beam forward Figure 2 is a like viewto-Figure 1 but showing the lay beam shifted rearward;

Figure 3 is a section on the line 3--3 of Figure 1; c l

Figure 4 is an enlarged longitudinal sectional view through one end ofthe lay beam showing the pick mechanism;

Figure 5 is a fragmentary View on the same section line as Figure 4 butshowing the action of the cam on the pick.

Referring to the drawings, 10 designates the loom frame of any suitableor usual character. This frame is provided with the longitudinallyextending guides 11 formed as rails disposed in a horizontal plane. Thelay beam 12 is of any suitable or usual form and carries upon itvertically disposed members 13, the lower ends of which are formed toprovide the slides 141 which slidingly engage the rails 11. The members13 which support the a lay beam have such an angle with relation to theslides that the lay beam is always supported at the proper angle withrelation to the shed. The members 18 extend upward and support the reedrail 15 carrying the reed 16. The members 13 are outwardly flanged attheir lower ends as at 17-, l j

Disposed rearward of the lay beam is the transverse shaft 18 formed withthe cranks 19. Connecting these cranks with the members 13 andthe laybeam are the connecting rods 30, these connecting rods having bearingsat theirtforward ends engagingwith transverse pins 31 extending throughthe flanges 17. By this means rotary motion given to the crank shaftwill cause reciprocation of the lay beam. Any suitable train of gear maybe used.for driving the crank shaft. l j i As illustrated, the members13 aremounted upon the lay beam by inserting member 13 between the ears20 and pinning or screwing the member 13 to the lay beam. The reed ismounted upon the upper ends of these members 13 by means of the screw21.

Disposed at the ends of the laybeam, are the picks whereby the shuttleis thrown across the face of the lay beam. Each of these picks consists.of an angular member 22, one end of which passes through a support 23mounted upon the lay beam. This end is formed with a cup 24 engageablewith the extremity of the shuttle. The lower end of the angular member22 is horizontally extended beneath the lay beam in bearings formed inthe members 23 and is engaged by a spring 25 whichurges the pickinwardor toward the shuttle. The member 22 projects out beyond thespring 25 and toward a horizontally extending shaft 26. There are two ofthese shafts, of course, mounted on each sideframe 10. Each of theseshafts at its end is geared by beveled gears to the crank shaft 18 andmay be driven therefrom in any suitable manner. Mounted upon each shaft26 is a cam 27 which as it rotateswith the shaft strikes against amember 28 carried upon the lower extremity of the member 22.

a This head 28 is so formed as to receive the impact of the cam and asthe cam rotates the pick will be forced out against the action of thespring, thus retracting the pick from the shuttle. As soon as the camhas passed the head 28, the cam suddenly releases the pick which isprojected toward the end of the lay beam violently under the action ofthe spring 25, thus projecting the shuttle from one shuttle box on oneend of the lay beam to the opposite endbf the box on the other end ofthe lay beam. The shuttle boxes are designated 29 and are so formed asto enclose the spring 25, arch over the end of the pick, and

rotect the vertical ortionof the member 22. The ends of the lay beam maybe cut away if desired to accommodate the picks. It will be noted thatthe slides and rails l f and 11 are disposed "at such an angle that thereed rail willa'lwaysha-ve'the proper angle of the shed when inoperation.

This construction is particularly adapted to b'e used in connection witha-Draper loom or a Stafford loom though I do not wish to be limited to"this application o'f my inventian. The construction which-[have devisedsets up m'ueh less vibration, isless expensive to operate,requireslessmaterial to construct,

gives mores'pace aroundthe machine, is=safer to o era'te and exertslessstrain and friction on t is shed than other'meehanisms for this pa"known tome. The {reed rail operates at t e angle'of'the shed whichdecreases to some degree the possibility of the shuttle hanging andbreaking the thread, *thus costin much less in the upkeep.

ile I have illustrated certain construction which I believe to F bearticularly edecthe for this purpose l do not wish to'be limited theretoas it is obvious that thismight be modified in many "ways withoutdeparting from the spirit of the claims.

I claim:-- 1. In a loomyasuppor'ting frame, a lay beam, spring projectedpicksmounted upon the endsof the lay beam, and power operated camselongated in the direction of movement-ofthe lay beam and at rightangles to the direction ef'movement of the picks engiliging said picksand intermittently forcing t em outward against the action of saidspring and then releasing the picks topermit t eir projection bythe'spring. 2. In a 'looma supporting beam mounted for movement in ahorizontal plane toward and from the shed, picks mounted upon the laybeam at each end thereof, each pickhav'ing a portion'movab lehorizontally beneath the lay beam, a spring urging each pick inward, ahorizontally disposed power driven shaft associated with each pick andapproximately parallel to the path of movement of the lay beam, and aca1n"elongated in a direction "parallel tothe direction of movementofthe lay beam and at right angles to the direction of a movement of thetally beneath the lay frame, a lay;

picks and carried upon the shaft for bodily rotation therearound and asthe shaft rotates intermittently engaging said pick to force it outwardagainst the action of said spring and then release it.

3. In a loom a supporting frame, a lay beam mounted for movement in ahorizontal plane toward and from the shed, picks mounted upon the laybeam at each end thereof, each pick having a portion extendinghorizonbeam, a spring urging each pick inward, a horizontally disposedpower driven shaft associated with each pick "and extending parallel tothe direction of motion of the lay beam, and a cam elongated in thedirection of movement of the lay beam and carried upon each shaft androtatable bodily therearound and as the shaft rotates intermittentlyengaging said pick to force it outward against the action of said springand then release it, each pick at its inner end and adjacent the shaftbeing provided with a head with which the cam engages.

4. In a loom, a supporting frame, a lay beam, spring projected picksmounted upon the ends of the lay beam, shafts mounted upon the frame andextending parallel to the direction of motion of the lay beam, camsmounted upon said shafts, each cam being elongated in the direction ofmotion of the lay beam and at right angles to the direction of motion ofthe picks, each cam being carried upon the shafts for bodily rotationtherearound whereby each. cam will intermittently engage against thecorresponding pick to force each pick outward against the action of saidspring and then release the pick to permit its projection by the spring,each cam being longitudinally adjustable upon its shaft.

5. In a loom, a'supporting frame, a lay beam, spring projected picksmounted upon the ends of the lay beam, shafts mounted upon the frame andextending parallel to the direction of motion of the lay beam, camsmounted upon said shafts, each cam being elongated in the direction ofmotion of the lay beam and at right angles to the direction of motion ofthe picks, each cam being carried upon the shafts for bodily rotationtherearound whereby each cam will intermittently engage against thecorresponding pick to force each pick outward against the action of saidspring and then release the pick to permit its projection by the spring,each cam being rotatably adjustable upon its shaft.

6. In a loom, a supporting frame, a lay beam, spring projectedpicksmounted upon the ends of the lay beam, shafts mounted upon the frame andextending parallel to the direction of motion of the lay beam, camsmounted upon said shafts, each cam being elongated in the direction ofmotion of the lay beam and at right angles to the direction of motion ofthe picks, each cam being carried upon its shaft for bodily rotationtherearound whereby each cam will intermittently engage against thecorresponding pick to force each pick outward against the action of saidspring and then release the pick to permit its projection by the spring,each cam being rotatably and longitudinally adjustable upon its shaft.

In testimony whereof I hereunto affix my signature.

BENJ. F. HOBSON.

